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Relationship between serum magnesium and preterm labour.
| Serum magnesium | Study patients |
Total N (%) |
|
|---|---|---|---|
| Case (preterm labour) |
Control (term labour) |
||
| N (%) | N (%) | ||
| <1.6 mg/dL | 47 (47.0) | 25 (25.0) | 72 (36.0) |
| ≥1.6 mg/dL | 53 (53.0) | 75 (75.0) | 128 (64.0) |
| Total | 100 (100.0) | 100 (100.0) | 200 (100.0) |
|
| |||
| Mean ± SD (mg/dL) | 1.73 ± 0.4 | 1.93 ± 0.4 | 1.83 ± 0.4 |
Relative risk = 1.83 (95% CI—0.72–0.38); P value = 0.024.
